No, you're simply misinformed likely due to widespread propaganda online. In the US the average worker makes about 10% more than 50 years ago. [1] And this is despite a massive outsourcing headwind of globalization that has made non-Americans vastly richer on average and pulled billions out of poverty globally. [2]
Inflation needs error bars. A small bias in how inflation is measured, over a long period of time, would create substantially different results. I personally don't doubt that we have more buying power, but we have basically just created better addictions that we waste that buying power on.
[0] https://www.reddit.com/r/dataisbeautiful/comments/1o5u4d1/oc...